The EHEIM Jager TruTemp Fully Submersible Aquarium Heater, with a power rating of 75W, provides precise temperature control for both marine and freshwater aquariums. Its thermo safety control feature prevents dry operation by automatically shutting off when the heater is out of water. Crafted from shatterproof glass, it ensures durability and safety. The TruTemp dial, along with the re-adjustment ring, enables users to calibrate the heater for accurate temperature readings tailored to their aquarium's requirements. Fully submersible and waterproof, it comes with an extra-long 5'6" cable for flexible installation. The heater includes a clamp with two suction cups for secure mounting and is suitable for aquariums up to 26 US gallons. An on/off indicator light adds convenience to its operation.